refactor(signals): Simple types

include/components/controller.hpp

@@ -42,8 +42,8 @@ namespace sig_ev = signals::eventqueue;
 namespace sig_ui = signals::ui;
 namespace sig_ipc = signals::ipc;
 
-class controller : public signal_receiver<SIGN_PRIORITY_CONTROLLER, sig_ev::process_broadcast, sig_ev::process_update,
-                       sig_ev::process_quit, sig_ev::process_check, sig_ipc::process_action,
+class controller : public signal_receiver<SIGN_PRIORITY_CONTROLLER, sig_ev::exit_terminate, sig_ev::exit_reload,
+                       sig_ev::update, sig_ev::notify_change, sig_ev::check_state, sig_ipc::process_action,
                        sig_ipc::process_command, sig_ipc::process_hook, sig_ui::button_press> {
  public:
   using make_type = unique_ptr<controller>;
@@ -63,10 +63,11 @@ class controller : public signal_receiver<SIGN_PRIORITY_CONTROLLER, sig_ev::proc
   void process_eventqueue();
   void process_inputdata();
 
-  bool on(const sig_ev::process_broadcast& evt);
-  bool on(const sig_ev::process_update& evt);
-  bool on(const sig_ev::process_quit& evt);
-  bool on(const sig_ev::process_check& evt);
+  bool on(const sig_ev::notify_change& evt);
+  bool on(const sig_ev::update& evt);
+  bool on(const sig_ev::exit_terminate& evt);
+  bool on(const sig_ev::exit_reload& evt);
+  bool on(const sig_ev::check_state& evt);
   bool on(const sig_ui::button_press& evt);
   bool on(const sig_ipc::process_action& evt);
   bool on(const sig_ipc::process_command& evt);

include/events/signal.hpp

@@ -92,10 +92,11 @@ namespace signals {
   }
 
   namespace eventqueue {
-    DEFINE_VALUE_SIGNAL(1, process_quit, event);
-    DEFINE_VALUE_SIGNAL(2, process_update, event);
-    DEFINE_SIGNAL(3, process_check);
-    DEFINE_SIGNAL(4, process_broadcast);
+    DEFINE_SIGNAL(1, exit_terminate);
+    DEFINE_SIGNAL(2, exit_reload);
+    DEFINE_SIGNAL(3, notify_change);
+    DEFINE_SIGNAL(4, check_state);
+    DEFINE_SIGNAL(5, update);
   }
 
   namespace ipc {

include/events/signal_fwd.hpp

@@ -6,10 +6,11 @@ POLYBAR_NS
 
 namespace signals {
   namespace eventqueue {
-    struct process_quit;
-    struct process_update;
-    struct process_check;
-    struct process_broadcast;
+    struct exit_terminate;
+    struct exit_reload;
+    struct notify_change;
+    struct check_state;
+    struct update;
   }
   namespace ipc {
     struct process_command;

include/events/types.hpp

@@ -2,6 +2,10 @@
 
 #include <cstdint>
 
+#include "common.hpp"
+
+POLYBAR_NS
+
 enum class event_type : uint8_t {
   NONE = 0,
   UPDATE,
@@ -16,6 +20,10 @@ struct event {
 };
 
 namespace {
+  inline bool operator==(uint8_t id, event_type type) {
+    return id == static_cast<uint8_t>(type);
+  }
+
   /**
    * Create QUIT event
    */
@@ -44,3 +52,5 @@ namespace {
     return event{static_cast<uint8_t>(event_type::CHECK)};
   }
 }
+
+POLYBAR_NS_END

include/modules/meta/base.inl

@@ -61,7 +61,7 @@ namespace modules {
       CAST_MOD(Impl)->wakeup();
       CAST_MOD(Impl)->teardown();
 
-      m_sig.emit(sig_ev::process_check{});
+      m_sig.emit(sig_ev::check_state{});
     }
   }
 
@@ -91,7 +91,7 @@ namespace modules {
   template <typename Impl>
   void module<Impl>::broadcast() {
     m_changed = true;
-    m_sig.emit(sig_ev::process_broadcast{});
+    m_sig.emit(sig_ev::notify_change{});
   }
 
   template <typename Impl>

src/components/controller.cpp

@@ -188,7 +188,7 @@ bool controller::run(bool writeback) {
   read_events();
 
   if (m_event_thread.joinable()) {
-    m_queue.enqueue(make_quit_evt(static_cast<bool>(g_reload)));
+    enqueue(make_quit_evt(static_cast<bool>(g_reload)));
     m_event_thread.join();
   }
 
@@ -312,7 +312,7 @@ void controller::read_events() {
 void controller::process_eventqueue() {
   m_log.info("Eventqueue worker (thread-id=%lu)", this_thread::get_id());
 
-  m_queue.enqueue(make_update_evt(true));
+  enqueue(make_update_evt(true));
 
   while (!g_terminate) {
     event evt{};
@@ -320,22 +320,26 @@ void controller::process_eventqueue() {
 
     if (g_terminate) {
       break;
-    } else if (evt.type == static_cast<uint8_t>(event_type::QUIT)) {
-      m_sig.emit(sig_ev::process_quit{make_quit_evt(evt.flag)});
-    } else if (evt.type == static_cast<uint8_t>(event_type::INPUT)) {
+    } else if (evt.type == event_type::QUIT) {
+      if (evt.flag) {
+        on(sig_ev::exit_reload{});
+      } else {
+        on(sig_ev::exit_terminate{});
+      }
+    } else if (evt.type == event_type::INPUT) {
       process_inputdata();
     } else {
       event next{};
       size_t swallowed{0};
       while (swallowed++ < m_swallow_limit && m_queue.wait_dequeue_timed(next, m_swallow_update)) {
-        if (next.type == static_cast<uint8_t>(event_type::QUIT)) {
+        if (next.type == event_type::QUIT) {
           evt = next;
           break;
-        } else if (next.type == static_cast<uint8_t>(event_type::INPUT)) {
+        } else if (next.type == event_type::INPUT) {
           evt = next;
           break;
         } else if (evt.type != next.type) {
-          m_queue.try_enqueue(move(next));
+          enqueue(move(next));
           break;
         } else {
           m_log.trace_x("controller: Swallowing event within timeframe");
@@ -343,14 +347,18 @@ void controller::process_eventqueue() {
         }
       }
 
-      if (evt.type == static_cast<uint8_t>(event_type::UPDATE)) {
-        m_sig.emit(sig_ev::process_update{make_update_evt(evt.flag)});
-      } else if (evt.type == static_cast<uint8_t>(event_type::INPUT)) {
+      if (evt.type == event_type::UPDATE) {
+        on(sig_ev::update{});
+      } else if (evt.type == event_type::INPUT) {
         process_inputdata();
-      } else if (evt.type == static_cast<uint8_t>(event_type::QUIT)) {
-        m_sig.emit(sig_ev::process_quit{make_quit_evt(evt.flag)});
-      } else if (evt.type == static_cast<uint8_t>(event_type::CHECK)) {
-        m_sig.emit(sig_ev::process_check{});
+      } else if (evt.type == event_type::QUIT) {
+        if (evt.flag) {
+          on(sig_ev::exit_reload{});
+        } else {
+          on(sig_ev::exit_terminate{});
+        }
+      } else if (evt.type == event_type::CHECK) {
+        on(sig_ev::check_state{});
       } else {
         m_log.warn("Unknown event type for enqueued event (%d)", evt.type);
       }
@@ -394,7 +402,7 @@ void controller::process_inputdata() {
 /**
  * Process broadcast events
  */
-bool controller::on(const sig_ev::process_broadcast&) {
+bool controller::on(const sig_ev::notify_change&) {
   enqueue(make_update_evt(false));
   return true;
 }
@@ -402,9 +410,7 @@ bool controller::on(const sig_ev::process_broadcast&) {
 /**
  * Process eventqueue update event
  */
-bool controller::on(const sig_ev::process_update& evt) {
-  bool force{evt.data()->flag};
-
+bool controller::on(const sig_ev::update&) {
   const bar_settings& bar{m_bar->settings()};
   string contents;
   string separator{bar.separator};
@@ -475,7 +481,7 @@ bool controller::on(const sig_ev::process_update& evt) {
 
   try {
     if (!m_writeback) {
-      m_bar->parse(move(contents), force);
+      m_bar->parse(move(contents), false);
     } else {
       std::cout << contents << std::endl;
     }
@@ -487,17 +493,25 @@ bool controller::on(const sig_ev::process_update& evt) {
 }
 
 /**
- * Process eventqueue quit event
+ * Process eventqueue terminate event
  */
-bool controller::on(const sig_ev::process_quit& evt) {
-  raise((*evt()).flag ? SIGUSR1 : SIGALRM);
+bool controller::on(const sig_ev::exit_terminate&) {
+  raise(SIGALRM);
+  return true;
+}
+
+/**
+ * Process eventqueue reload event
+ */
+bool controller::on(const sig_ev::exit_reload&) {
+  raise(SIGUSR1);
   return true;
 }
 
 /**
  * Process eventqueue check event
  */
-bool controller::on(const sig_ev::process_check&) {
+bool controller::on(const sig_ev::check_state&) {
   for (const auto& block : m_modules) {
     for (const auto& module : block.second) {
       if (module->running()) {
@@ -506,7 +520,7 @@ bool controller::on(const sig_ev::process_check&) {
     }
   }
   m_log.warn("No running modules...");
-  enqueue(make_quit_evt(false));
+  on(exit_terminate{});
   return true;
 }
 

src/components/screen.cpp

@@ -113,7 +113,7 @@ void screen::handle(const evt::randr_screen_change_notify& evt) {
   }
 
   m_log.warn("randr_screen_change_notify (%ux%u)... reloading", evt->width, evt->height);
-  m_sig.emit(process_quit{make_quit_evt(true)});
+  m_sig.emit(exit_reload{});
   m_sigraised = true;
 }
 

src/x11/tray_manager.cpp

@@ -286,7 +286,7 @@ void tray_manager::deactivate(bool clear_selection) {
 
   m_connection.flush();
 
-  m_sig.emit(process_update{make_update_evt(true)});
+  m_sig.emit(notify_change{});
 }
 
 /**
@@ -325,7 +325,7 @@ void tray_manager::reconfigure() {
 
   m_connection.flush();
 
-  m_sig.emit(process_update{make_update_evt(true)});
+  m_sig.emit(notify_change{});
 }
 
 /**

src/x11/xutils.cpp

@@ -13,8 +13,11 @@ namespace xutils {
   xcb_connection_t* get_connection() {
     static xcb_connection_t* connection;
     if (!connection) {
-      XSetEventQueueOwner(xlib::get_display(), XCBOwnsEventQueue);
-      connection = XGetXCBConnection(xlib::get_display());
+      auto display = xlib::get_display();
+      if (display != nullptr) {
+        XSetEventQueueOwner(display, XCBOwnsEventQueue);
+        connection = XGetXCBConnection(xlib::get_display());
+      }
     }
     return connection;
   }